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Canadian Journal of Public Health

, Volume 94, Issue 1, pp 59–63 | Cite as

The Impact of Influenza-associated Respiratory Illnesses on Hospitalizations, Physician Visits, Emergency Room Visits, and Mortality

  • Verena H. Menec
  • Charlyn Black
  • Leonard MacWilliam
  • Fred Y. Aoki
Article

Abstract

Objectives: Although the increased risk of hospitalization and mortality during influenza seasons has been documented extensively, there is a relative paucity of research on the impact of influenza-related illnesses on other health care use indicators, such as physician use. The purpose of this study was to examine the impact of influenza-associated respiratory illnesses on the Winnipeg health care system, including hospitalizations, physician visits and emergency room visits. Their impact on mortality was also examined.

Methods: Administrative data were used to track health care use and mortality over four influenza seasons (1995–96 to 1998–99). Excess health care use and deaths were calculated by subtracting rates during influenza seasons from those during weeks when influenza viruses were not circulating.

Results: Significant excess hospitalization, physician visit, and emergency room visit rates emerged for influenza and pneumonia, acute respiratory diseases, and chronic lung disease, especially among children and adults aged 65 and over. Considerable excess mortality due to influenza and pneumonia and chronic lung disease among individuals aged 65 and over also emerged, particularly among nursing home residents.

Discussion: Influenza-associated respiratory illnesses have a substantial impact on the health care system. Given the burden of illness among children during influenza seasons, the study further suggests that influenza vaccination might be considered for this age group.

Résumé

Objectifs: Les risques accrus d’hospitalisation et de mortalité durant la saison grippale sont bien documentés, mais les études sur les incidences des maladies liées à la grippe sur d’autres indicateurs de l’utilisation des soins de santé, comme le recours aux médecins, sont encore relativement rares. On examine ici les incidences des maladies respiratoires associées à la grippe sur le système de soins de santé de Winnipeg (hospitalisations, visites chez le médecin et visites aux salles d’urgence). On examine aussi leurs incidences sur la mortalité.

Méthode: À l’aide de données administratives, on a suivi l’utilisation des soins de santé et la mortalité sur quatre saisons grippales (1995–1996 à 1998–1999). La surutilisation des soins de santé et la surmortalité ont été calculées en soustrayant les taux durant les saisons grippales des taux durant les semaines où les virus de la grippe ne circulaient pas.

Résultats: La grippe, la pneumonie, les maladies respiratoires aiguës et les pneumopathies chroniques ont causé d’importants excédents dans les taux d’hospitalisation et les visites chez le médecin et dans les salles d’urgence, surtout pour les enfants et les adultes de 65 ans et plus. Une importante surmortalité due à la grippe, à la pneumonie et aux pneumopathies a aussi été enregistrée chez les 65 ans et plus, tout particulièrement parmi les pensionnaires de maisons de soins infirmiers.

Débat: Les maladies respiratoires associées à la grippe ont de graves répercussions sur le système de soins de santé. Comme les enfants tombent souvent malades durant la saison grippale, on recommande aussi d’envisager de les vacciner contre la grippe.

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Copyright information

© The Canadian Public Health Association 2003

Authors and Affiliations

  • Verena H. Menec
    • 1
    • 2
  • Charlyn Black
    • 1
    • 2
  • Leonard MacWilliam
    • 1
    • 2
  • Fred Y. Aoki
    • 3
  1. 1.Department of Community Health SciencesUniversity of ManitobaWinnipegCanada
  2. 2.Manitoba Centre for Health PolicyUniversity of ManitobaWinnipegCanada
  3. 3.Department of MedicineUniversity of ManitobaWinnipegCanada

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